Eric,
This warning is coming from the GDB debugger, therefore we at the CCS forum are not the most experienced in its use.
That said, I wonder if the GDB executable you are using does not match ARM targets or perhaps is a slightly different release when compared to your GCC compiler (something that is mentioned here and here).
The fact the GDB shows this as a warning implies this is a non-blocking issue, therefore it may be harmless or minimally affect the ability to debug the system. However, as I mentioned before we are not the most experienced in GDB and therefore you may be able to obtain additional help from the Sitara or from the open source discussion forums on the internet.
Hope this helps,
Rafael